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DC Generators

DC Generators
In case of dc machines, mechanical losses are primary function of

Speed
None of the listed here
Current
Voltage

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DC Generators
Stray losses consist of

Mechanical and copper losses
None of the listed here
Magnetic and copper losses
Magnetic and mechanical losses

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DC Generators
A 4-pole dc machine has _____ magnetic circuits.

4
8
6
2

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DC Generators
High voltage dc machine use _____ winding.

Wave
Either lap or wave
Lap
None of the listed here

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DC Generators
The main factor which leads to unstable parallel operation of flat and over compounded generators is

unequal speed regulation of their primemovers
unequal series field resistances
unequal number of turns in their series field windings
their rising voltage characteristics

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DC Generators
The copper loss is constant for

None of the listed here
Series generator only
Shunt generator only
Both shunt and compound generator

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